NFS symbols on the desktop

How do i get rid of all that useless NFS symbols at the desktop?

Open the Control Center (Kontrollzentrum) (to find for example in the K-Menu). Choose Desktop (Arbeitsfläche)
> Behavior (Verhalten) and then the tab Device Icons (Gerätesymbole). There you may remove the checkmark
Mounted NFS Share (Eingebundene NFS-Freigabe) and Unmounted NFS Share (Nicht eingebunden NFS-Freigabe).